Double-seaming machine



0. P. NYSTROM.

DOUBLE SEAMING MACHINE APPLICATION FILED MAR. 31. 1917.

Patented Mar. 2, 1920.

4 SHEETS-SHEET l- L -|J 'I I '1 :1 'l

l :I U i h II II Ll 0. P. NYSJROM.

DOUBLE SEAMING MACHINE.

APPLICATION man MAR. 31. 1911.

1,332,352. Patented Mar.2,1920.

4 SHEETS-SHEET 2.

0. P. NYSTROM.

DOUBLE SEAMING MACHINE.

APPLICATION FILED MAR. 31, I917- Patented Mar. 2, 1920.

4- SHEETSSHEET 3 9 J I a 4 f 2 2; a g ,3 W f 2. i 7T7 o w I "a a a? AF \u 2 H K 3 r l... 00: 1

M a o w m M? Q 5 a 3? 5 '0. P. NYSTROM. DOUBLE SEWING MACHINE.

APPLICATION FILED. MAR. 31, 19]?- Patented Mar. 2, 1920.

4 SHEETS-SHEET 4.

OSCAR}. NYSTROM, OF HOLLAND, MICHIGAN.

DOUBLE-S-EAMING MACHINE.

Specification of Letters Patent.

Patented Mar. 2, 1920.

Application filed March 31, 1917. Serial No. 159,048.

To all whom it may concern:

Be it known that 1, Oscar: P. NYSTROM, a citizen of the United States of America, residing at Holland, in the county of Ottawa and State of Michigan, have invented certain new and useful Improvements in Dc-uble-Seaming Machines; andI do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the vart to which it appertains to make and use the same.

This invention relates to a machine adapted for use in connecting a circular top of sheet metal to a substantially cylindrical or conical side member to thereby form the upper part or dome of the outer casing of a furnace, the machine connecting said members together very firmly and making a double seam between them which effectssuch firm and rigid connection. Many novel features of construction and operation are included in the machine for attaining this and various other ends not specifically enumerated as will appear from the description of a preferred embodiment {Of the invention which is fully disclosed in the accompanying drawings in which;

Figure l is a side elevation, with parts broken away and shown in section, of the complete machine.

Fig. 2 is a plan view thereof.

Fig. 3 is an end elevation from the left of Fig. 1.

Fig. 4 is a fragmentary vertical section on the line iof Fig. 1.

Fig. 5 is a plan view of the supporting base bar of the machine.

Fig. 6 is an end elevation thereof.

Fig. 7 is a vertical section through a part of the machine which carries the seam forming dies.

Figs. 8, 9, 10 and 11 are fragmentary sections illustrating the various steps in the process of attaching the top member to the side member of the upper part of the furnace casing and,

Figs. 12 and 13 illustrate the method of forming the seam between said top and side members.

Like reference characters refer to like parts throughout the several views of the drawings.

In the construction of the machine there is provided a relatively long base bar 1 which may be supported ateach end a dist nce above the finer y supporting legs :2-

The bar is slotted for a portion .of its length, as indicated at 3, and a relatively wide and shallow groove at is made in the bar to each side of the slot. A post 5 of cast iron is located directly above the bar and rests thereon, it having an enlarged base 6 formed with a downwardly projecting guide 6 adapted to .be receive'd in the groove 4:, as shown in Fig. 4, and this post is held on the base bar by means of bolts 7 passing throu h slot 3, it being evident that adjustment of the post may be effected within limits prescribed by the length of the slot. The post is strengthened and reinforced by a brace 8 connected at the upper end of the post and extending downwardly to the base 1 to which it is adjustably connected by a bolt 7 passing through the slot 3.

A wheel 9 having an outer rim and radial spokes is located above the upper end of the post and has a depending rod 10 extending from its hub into the post 5 which. is bored vertically to receive the rod. A cross shaft 11 is loosely mounted in the post 5 and has a c'am 12 thereon within the post. A bushing 13 which in practice is a se'ti0n of a rod of the same diameter as rod 10 rests .upon the cam 12, the lower end of rod 10 in turn resting upon the upper end of this bushing. It is evident that the wheel and attached rod may be freely rotated and that by operation of the hand wheel 14: on the end of the cross shaft 11 the wheel as a whole may be raised or lowered a limited amount.

Post 5 is located adjacent one end of the bar .1 and, in addition, the machine includes a second post 15 strengthened and braced by a brace 16 adjacent the opposite end ofthe base 1 secured thereto and projecting upwardly therefrom. At its upper end the post is formed with an integral head 17 on which a member 18 is adjustably mounted by means of a screw 19 threading into the head 17 and passing through a depending portion of the member 18. Hand wheel 20 is used to turn the screw and secure a desired adjustment.

At what may be considered the rear end ofmember 18 a pair of upwardly extending spaced apart supports 21 project, between which a bearing 22 is located and pivotally mounted to turn about a :pin 28 as shown in Fig. 7. A shaftis rotatively mountedin the bearingand passes above the plane at The shaft extends over the member 18 and through a second bearing 26 loosely mounted between the sides of a front frame 27 which is secured permanently to the member 18 as shown. The bushin rests upon the front end of a lever 28 w ich is pivotally mounted between its ends, said front end being rounded and fitting into a notch in the under side of the bushing as shown in Figs. 1 and 7. A strong leaf spring 29 secured to and on the upper side of the member 18 its free end engaging with the opposite end of the lever 28 so that the normal tendency of the spring is to elevate the bushing. A screw 30 threads through the upper part of the member 27 against the upper side of bushing 26 and has an operating handle 31 for manual operation.

On shaft 24 in front of the bushing 26 a beveled pinion 32 is, connected in front of which a die is located. The die is of circular outline and includes two narrow circular die surfaces 33 and 34 the former being of greater diameter than the latter and also back of the latter while between such surfaces an inclined circular die surface 35 is made as best shown in Figs. 12 and 13. The forward end of the member 18 is bifurcated making spaced apart sides 36 which at their front ends are connected by a transverse bar 37. Between the sides 36 a block 38 is slidably mounted and a coil spring 39 is interposed between the block and the bar 37 the tendency of which is to force the block to therear. A cross bar 40 is located below and between the sides; 36 in which a short vertical shaft 41 is mounted to the upper end of which a cam 42 is secured against which the rear side of the block 38 is pressed by the spring 39. A hand wheel 43 is used to operate the cam, it being apparent that in one position the cam forces the block 38 to its. forward limit and that in the other the spring 39 forces the block 38 to its rear limit of movement.

The block 38 serves to carry a short shaft 44 which is positioned at an incline to the vertical and loosely mounted in the block. A beveled pinion 45 is connected to the shaft as'is also a second die member positioned immediately below the pinion and having a short circular surface 46 below which is a section 47 of larger diameter it having a substantially horizontal ledge on its upper side as shown.

In the operation of the machine a member 48 of sheet metal of curved outline. and, as shown in the drawings, of frusto-conical shape has its upper edge turned outwardly to make an annular ledge 49. The upper end of this member is open and to cover the same a circular cover having a downwardly and inwardly entending bur 51 is placed over the member 48 as shown in Figs. 8 and 9 so that the bur turns slightly in and under the ledge 49. When thus located with respect to each other members 48 and 50 are placed over the wheel 9, which is. of a diameter adapted to receive such members, and the outer surface of which, it will be noted, is inclined substantially to correspond with the incline of the sides of member 48. When such sheet metal parts are placed over the wheel 9 the block 38 and attached gear and die are in rearward position and the wheel 9 is in its lower position. The block 38 is then forced forward by turning hand wheel 43 so that the ledge on the section 47 of the lower'die comes directly beneath the outwardly extendingannular ledge 49 of member 48. Handle 41 is then turned to depress pinion 32 into mesh with pinion 45 this bringing the narrow circular section 33 of the upper die directly above the ledge on section 47 of the lower die as shown in Fig, 12. By turning the handle 25 the two sheet metal members are run through between the dies and the first operation in connecting top 50 to the sides of member 48 is completed as shown in Figs. 10 and 12 in which bur 51 is turned under and tightly against the under side of the ledge 49. The second step of the operation consists in turning crank 31 to permit the elevation of gear 32 and the attached die after which the lower die is retracted by turning hand wheel 43. The wheel 14 is then turned to elevate the large wheel 9 on which the casing furnace top is located. and the crank 31 is turned to bring the sides 34 and 35 of the upper die into close engagement with the outstanding part at the jo nt or seam between the top and sides of the casing. This is illustrated in Fig. 3 and by turning crank said outstanding parts at joint are bent downwardly and parallel the sides of the member 48 as shown in Figs. 11 and 13 thereby making an effective double seam joint between top and sides of the upper member or dome of the furnace casing. During); this operation the lower die is inoperative, it being of use only in performing the first step of the operation as described. 7

The machine as thus described has been used in actual practice and is very effective 1n operation. By it very rapid connection of the tops and sides of the upper parts of furnace casings may be secured. It is. of course. apparent that the machine is pable of other uses and is not limited to male ing furnace casings alone. Furnace casingsare of various sizes and for the different sizes a different size wheel such as indicated at 9 may be used and adjusted to proper position with respect to the dies. This adjustment by means of bolts 7 in the slot 3 will necessarily,be a rough adjustment and the finer adjustment is secured by the screw 19.

Many changes in structural detail may be resorted to without departing from the invention. For instance, the machine is not limited in use to construction of frusto-conical outline and by changes in the design of the dies and of the wheel 9 may be made to form the connection between the top and sides of a cylinder quite as well. Accordingly, I do not wish to be limited to the exact specific structure shown and described but consider myself entitled to all modifications of structure falling within the scope of the appended claims which define the invention.

claim 1. In combination, a base, a post mounted thereon, a wheel rotatably carried by the post, said wheel having a rim the upper surface of which lies in a horizontal plane, a second post secured to the supporting base in spaced relation to the first post, a head at the upper end of the second post, a member adjustably mounted on the head for adjustment toward or away from the wheel, said member being divided to make spaced apart sides at the end nearest the wheel, a bar connecting the ends of the sides, a block slidably mounted between said sides, a spring between said bar and the block, a cam rotatably mounted on the member back of and in contact engagement with the block, a shaft loosely mounted in and extending above the block, a circular die on the shaft directly above the block, said die having a narrow substantially vertical cylindrical surface below which is a substantially horizontal annular ledge, a beveled gear directly above the die and movable therewith, a frame having spaced apart sides and an upper connecting part secured to and extending upwardly from said member above said gear, a lever pivotally mounted between its ends on said frame and located between the sides thereof and above the gear, a leaf spring fixed at one end to the upper side of the member and hearing at its other end against the upper side of one end of the lever, a be ring loosely mounted between the sides of the frame, said bearing having a notch in its under side in which the opposite end of the lever seats, a screw-threaded rod threaded through the upper connecting part of the frame, its lower end seating against the upper side of the bearing, a crank on the rod for turning the same, a pair of spaced upright supports at the opposite end of said member, a second bearing pivotally mounted on and between said supports, a shaft loosely mounted in and extending through the bearings, a crank for turning the shaft, a second beveled gear on the shaft adapted to mesh with the first gear in one position thereof, and a second circular die fixed on the shaft adjacent the gear, said die in eluding two narrow cylindrical die faces of different diameters with an inclined annular face connecting the cylindrial faces, substantially as described.

2. In combination, a base, a post mounted on the base, wheel rotatably mounted to turn about a vertical axis on the post, the upper surface of the rim of the wheel being positioned horizontal, a second post secured to the supporting base a distance from the first post, a support ng member connected to the upper end of the post, a block slidably mounted on said member adjacent the end thereof nearest the wheel, means normally moving said block in a direction away from the wheel, a cam rotatably mounted on the member and engaging with the block to move it in the opposite direction, a shaft loosely mounted in and extending above said block, a circular die on the shaft above the block, said die having a narrow substantially vertical cylindrical surface below which is a substantially horizontal annular ledge, a beveled gear above and movable with the die, a frame having spaced apart sides connected by an integral section at their upper ends secured to and extending upwardly from the member above the gear, a lever pivotally mounted between its ends between the sides of the frame above the gear, spring means engaging with one end of the lever tending to elevate the opposite end thereof, a bearing loosely mounted between the sides of said frame, said bearing resting on said opposite end of the lever, a rod threaded through the upper part of the frame against the upper side f the bushing, means to turn said rod, a second bearing pivot-ally mounted above and at the other end of said member, a shaft loosely mounted in and extending through the bearings, a crank on the shaft, a second beveled gear on the shaft located above the first gear, and a second die fixed on the shaft adjacentsaid second gear, said die including two narrow cylindrical die surfaces of different diameters with an inclined annular face connecting them, sub stantially as described.

3. In combination, a supporting base, a post mounted on the base, a wheel located in horizontal relation above the post and rotatably mounted to turn about a vertical axis, a second post secured to the supporting base a distance from the first post a sup- POl'lllIlg member connected to the upper end of said second post, a combined beveled gear and circular die slidably mounted on said member adjacent the wheel, said gear and die being mounted forrotation, means normally tending to force said gear and die away from the wheel, means for manually moving the gear and die toward the wheel, said die having @a substantially vertical cylindrical section with a substantially horizontal ledge below said section, a frame having spaced apart sides and an integral upper connecting section secured to and ex tending upwardly from member, a lever p1votally mounted between its ends between the sides of the frame, spring means engaging with one end of the lever tending to elevate the opposite end thereof, a bearing loosely mounted between the sides of the frame and resting on the opposite end of the lever, a rod threaded through the upper part of the frame against the upper side of the bushing, means to turn said rod, a second bearing pivotally mounted above and at the opposite end of said member, a shaft rotatably mounted in and extending through the bearings, a crank on the shaft, a second beveled gear on the shaft located above the first gear and a second die fixed on the shaft adjacent said second gear including two narrow cylindrical die surfaces of different diameters with an annular face disposed between them, substantially as described.

In combination, a supporting base, a post mounted on the base, a wheel rotatably iiounted on the post to turn about a ver'- cal axis, the upper surface of the rim of said wheel being located horizontally, a second post secured to the supporting base a distance from the first post, a member connected to the upper end of the second post, a combined beveled gear and die slidably mounted at the end of the member adjacent the wheel, said gear and die also being mounted for rotation, spring means normally tending to force the gear and die away from the wheel, manually operable means for moving the gearand die toward the wheel, a frame having spaced apart sides the upper ends of which are connected by an integral section secured to and extending upwardly from the member above the gear, a lever pivotallv mounted between its ends between the sides of the frame above the gear, spring means engaging with one end of the lever tending to elevate the opposite end thereof. a bearing resting on said opposite end of the lever and loosely mounted be tween the sides of the frame, a rod threaded through the upper connecting section of the frame and bearing against the upper side of the bushing, means to turn the rod, a second bearing pivotally mounted above the other end of the member, a shaft rotatably mounted in and extending through the bearings, means to turn the shaft, a second beveled gear on the shaft located above the first beveled gear and a second die on the shaft adjacent said second gear located above the first die and adapted to cooperate therewith when said first die has been moved to posi-, tion nearest the wheel, substantially as described.

5. In combination, a supporting wheel mounted for rotation in a horizontal plane, a member located in substantially the Same horizontal plane with the wheel and adjacent one side thereof, a block slidably mounted on said member on the end thereof adjacent the wheel, means normally tending to force the block away from the wheel, means for manually moving the block toward the wheel, a combined beveled gear and circular die mounted for rotation about a substantially vertical axis on the block, a frame having spaced apart sides connected at their upper ends by a cross member secured to and extending upwardly from the member above said block, a lever pivotally mounted between its ends between the sides of the frame, spring means engaging with one end of the lever tending to elevate the opposite end thereof, a bearing resting on said opposite end of the lever and loosely mounted between said sides of the frame, means for manually depressing said bearing, a second bearing pivotally mounted above and at the other end of said member, a shaft rotatably mounted in and extending through the bearings, a crank on the shaft, a second beveled gear on the shaft positioned above the first beveled gear and a second circular die fixed on the shaft and adapted to cooperate with the first mentioned die, substantially as described.

6. In combination, a support, a wheel mounted for rotation in a horizontal plane thereon, a block slidably mounted on the support adjacent one edge of the wheel and a short distance below the upper surface thereof, means tending to force the block away from the wheel, manually operable means for moving the block toward the wheel, a combined beveled gear and circular die mounted for rotation on and above the block about an axis slightly inclined to the vertical, said die including a narrow sub stantially vertical cylindrical surface below which is a substantially horizontal annular ledge, said ledge lying in substantially the same horizontal plane with the upper surfaces of the wheel rim when said wheel is in its lowest position, a substantially horizontal shaft mounted for rotation above said gear and die, means for turning the shaft, a second gear and die fixed on the shaft above the first gear and die, said second gear being adapted to mesh with the first gear when the block is in position nearest the wheel, said die including two narrow cylindrical die surfaces of diflerent diameters with an inclined annular face connecting them, the die face of the smallest diameter coming directly above the rim of the wheel and the die face of the larger diameter coming directly above the ledge of the first die when the gears are engaged, means normally tending to elevate the end of the shaft nearest the wheel, and means to force said shaft to lower position, substantially as described.

7. In combination, a support, a wheel mounted for rotation in a horizontal plane on the support, means for raising and lowering the wheel a limited distance, a combined beveled gear and die member slidably mounted on the support adjacent one edge of the wheel, yielding means normally tending to force the gear and die away from the wheel, manually operable means for moving them toward the wheel, a shaft rotatably mounted on the support and located above said gear and die member, a second gear and die member fixed to the shaft above the first gear and die member and cooperating therewith, means normally tending to elevate the end of the shaft carrying said second gear and die, and means for forcing the shaft to lower position, substantially as described.

8. In combination, a. wheel mounted for rotation in a horizontal lane, means to raise and lower the wheel a limited distance, a die having a narrow substantially vertical cylindrical surface below which is a substantially horizontal annular ledge rotatably mounted adjacent one edge of the wheel the upper surfaces of the wheel and of the ledge being in substantially the same horizontal plane when the wheel is in lower position, means normally tending to move the die away from the wheel, means for forcing the die toward the wheel, a horizontal shaft rotatably mounted above said die, a second die fixed on one end of the shaft including a narrow cylindrical die surface positioned directly above the horizontal ledge of the first die when said first die is moved to position adjacent the edge of the wheel and a second cylindrical die surface of less diameter located directly above the upper surface of the rim of the wheel and an inclined annular face connecting said cylindrical die surfaces, means normally tending to elevate the end of the shaft on which said die is fixed, means to force said shaft to lower position, and gearing connections between said shaft and the first mentioned die for driving the dies in unison when said first die is moved to position adjacent the side of the wheel and the second die lowered to cooperate therewith.

9. In combination, a support, a wheel mounted thereon for rotation in a horizontal plane, means to raise and lower the wheel a limited amount, said wheel being adapted to receive and carry a dome of frusto-conical outline and a fiat top, said dome at its edges having an annular outturned ledge and said top having a bur turned under said ledge,

upper and lower independently adjustable die members adapted to engage with said top at its edges and turn the bur tightly against the under side of the ledge, the upper of said die members being mounted to turn about a substantially horizontal axis and the lower about an axis inclined slightly to the vertical, means to drive said die members in unison, means for retracting the lower of said die members to inoperative position, the upper die member thereupon being adapted to engage with said ledge and top to turn the same against the sides of the casing.

In testimony whereof I aiiix my signature.

OSCAR P. NYSTROM. 

